Gyratory crusher



April 24, 1928.

- 1,667,337, W. S. WESTON GYRATORY CRUSHER Filed Feb. 25. 1926 Patented Apr. 24, 1928.

' ED T PA-TENroFI-ucE.

WILLIAM S. WESTON, F COL'UKBIAgSOUTH CABOLINA.

.GYRATOBY. enema.

Application filed February 23,1926. Serial no.;.ao,121.

The present invention relatesto gyratory crushing machines, and particularly to machines of thetype illustrated in Patent'No. 1,528,741, issued to me 'March3', 1925. I

In that patent a gyratory crushingmm chine is described and illustrated in which the eccentric is mounted in a hearing at the top of the frame and is lubricatedlhy means of oil from a receptacle mounted on the 5 1a ft. The receptacle gyrates with the shaft and there is a natural tendency for the oil to be thrown out. A dust cap rests ,upon the upper edge of theoill receptacle forthe purpose of preventing the entrance of dirt and dust therein and the escape of oil from the receptacle by splashing. In accordance with the present invention, an im'provedtyp'e of.

dust cap is provided which is designed and constructed to offer increased resistance to the escape ofoil, fromhthe receptacle while at the same time thoroughly shielding the oil chamber from thedust. and flying particles of grit which areconstantly present whenthe crusheris in operation.

Theinvention may have various pending upon the typeof crusherto which it is applied, and in the accompanying" drawings one form thereofis illustrated. It will be understood, however, that thisembodiment is advanced by way of example only and that in applyingthe invention it may be embodied in other and difierently designed structures ithout departure from the spirit and scope thereof. I

In the drawings: c V

Figure 1 is, an axial section through the upper end of a gyratory crushing machine in which the invention has been incorpo ratedrand I i Figure 2 is a section through the dust cap, on a larger scale.

Many portions of the crusher are not illustrated, such as the lower portion of the frame, the crushing cone, etc., and these parts may be of conventional type, or that portion of the crusher. which is not illuse trated may be formed as shown in my prior patent above referred to. The upper'end of the frame is indicated at 10, the gymtory shaft at 11, the bearing at 12, and the eccentric sleeve atlS. The bearing includes a cylindrical portion 12 whichis coaxial with the frame and within which the eccentric 13 is rotatably mounted. Rigidly supported-upon the shaft is the oil recepof the oil receptacle, asset forth above.

forms, do

was 14, are substantiallycylindrical wall or this receptacle extending fora considerable dlstarice above the lower end of the cylin drical portion 12 of thebearing and being inturned as shown leaving, however, a cen- .tral circular aperture 15 the margin of which encirclesIthefcylindrical portion "12f of the bearing'and is coaxial with theshaft 11. r i Theinturned upper edge of receptacle'14 is provided with a spherical bearing surface 1 centered, about "the center of gyration ofshaft 11, and the dust cap 16 is, provided wit-h a similarly formed surface which rests thereon. This dust capis of annular form and'is L-s'haped in cross section, having a cylindrical portion 16 which fits closely around the outer wall of the cylindrical bearing 12, and a laterally extending flange portion 16 whiehxrests upon the upper edge In the normal operation of the crusher, the oil receptaclegyrates with the shaft" whilethe dust cap 16 remains stationary, bemg held against movement bythe bearingport1on12f-.p The oil within the receptacle is rendered turbulent by the movement of the There receptacle and tends to splash out.

are two possible waysof escape for theioil;

the first being between the cylindrical por (31011 16 of the dust cap and the cylindrical portion 1280f the bearing, and the second being between themutually abutting spher ical faces of the dust ca and the upper edge ofthe oil receptacle.

e have discovered that by internally grooving the cylindrical portion of the dust ca as indicated at 16,

escape of oil betweent e dust cap and bearingas ractically prevented Oil splashing from t e receptacle into the narrow space between the bearing and dust ca flows into the grooves and does notshoot t irough this space to the/outside of the dust cap, and

from the grooves drains back into the -re-- ceptacle.

Oil which makes its way in between the mutually abutting spherical surfaces of the oil receptacle, and dust capyis collected in a groove 16 formed in the under surface of the dust capand is brought back into the receptacle by a scraping action. In the operation of the crusher the dust cap remains stationary, as before explained, while the oil receptacle moves in a circular path about the axis ofthe'machine, although it does not rotate. All portions of the groove 16 are,

therefore, successively brought into register with the open mouth of the oil receptacle, and the oil which is contained in such portion drops downwardly to join the body of oil in the receptacle. While any one portion of this groove is in register with the mouth of the oil receptacle, the remaining portions are acting to gather, by scraping action, the oil which is penetrating between the receptacle and dust cap and to collect it in the groove ready to be discharged back into the oil receptacle. This action is continuous so long asthe crusher is in operation and as a result practically no oil is allowed to escape beyond the dust cap.

The eccentric 13 may be driven by any suitable source of power (not illustrated) and the other portions of the machine, as before mentioned, may he of conventional type. I contemplate also that the dust cap and the oil collecting-and returning means may be formed in various ways Without departing from the invention.

While I have described the dust cap 16 as remaining stationary during the operation of the machine this is not exactly the case inasmuch as this cap has a very slow creeping movement of rotation about the axis of the bearing due to the gyratoryaction of the oil receptacle.v This creeping motion however is immaterial from the standpoint of the present invention, the dust cap being, for present purposes stationary as before set forth. I

Having thus described my invention, Whatl claim as new and desired to be securedhy Letters Patentis: I 1. A gyratory crusher comprising, in combination, a shaft supported at one end for a gyratory motion about a point, a rotatableeccentric sleeve for imparting gyratory motion tosaid shaft, a bearing for said sleeve, and means for lubricating said eccentric sleeve including an oil receptacle fixed on the shaft and having an open month, said receptacle having a cover resting on the edge thereof, the bearing surface of the cover being a portion of a] sphere having the center ,of gyration of the shaft as a center, and said surface having an annular groove formed therein, centered about the axis of the bearing, for the purpose set forth.

2. A gyratory crusher comprising, in combination, a shaft supported at one end for gyratory motion about a point, a rotatable eccentric sleeve for imparting gyratory motion to-said shaft, a bearing for said sleeve, and means for lubricating said eccentric sleeve including an oil receptacle fixed on the shaft and having an open mouth, a dust cap having a portion bearing on 'the edge the receptacle and having a cylindrical portion fitting closely around the sleeve supporting portion of the bearing, and oil retaining grooves formed in the inner wall. of said cylindrical portion.

3. The combination set forth in claim 1 but in which the diameter of the annular groove is slightly greater than the diameter of the mouth of the oil receptacle.

4:. In a gy'ratory crushing machine, the combination with a frame, a bearing mounted in the. frame and having, a central cylin' drical portion surrounding the gyratory shaft, an open mouthed oil receptacle mounted uponhthe gyratory shaft and movable therewith, and means for preventing escape of oil from the mouth of the receptacle as the shaft gyrates including. an annular lid having a cylindrical central portion fitting around the cylindrical portion of the hearing, and aperipheral' flange projecting outwardly therefrom, the lower surface of which rests upon the upper edge of the oil receptacle, said lower surface and theinner surface of the cylindrical central portion being concentrically grooved, for the purpose set forth. 7 r

5. The combination set forth in claim 4 in Whichthe lower surface of the peripheral WILLIAM s. wns'ron. 

